Splitting and buffing machine



F. M. FURBEH. SPLITTING AND BUFFING MACHINE.

APPLICATION HLED JAN-2| 1920.

Patented Nov. 1, 1921.

Fig.1

VE/V 7 04 Z M UNITED stares PATENT OFFICE.

FREDERICK M. FURIBER, OF REVERE, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SPLITTING AND BUFFIN'G MACHINE.

Specification of Letters Patent.

Patented Nov. 1, 1921.

Application filed January 2, 1520. Serial No. 348,861.

To all whom it may concern;

Be it known that I, FREDERICK M. Funnnn, a citizen of the United States, residing at Revere, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Splitting and Buffing Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to machines for use in the manufacture of boots and shoes and is herein illustrated as embodied in a machine for forming a flap on the rear end of a sole and for bufling one surface of the flap and part of the contiguous surface of the sole.

It is customary, when a shoe having a Wooden Louis heel is being made, to produce on the heel end of the unattached sole a thin flap which, after the sole has been attached, is bent down away from the sole and cemented to the breast of the heel to serve as a covering for the breast thereof; and sub sequently the bottom of the sole and the exposed surface of the flap, which then covers the breast of the heel, are buffed in preparation for the application of stain. The forepart of the bottom of the shoe is buffed on the usual shoe bottom buffing machine; but, owing to the size of the rolls of that machine and to the peculiar curvature of thebreast of a Louis heel, itis not possible to buff either the breast of the heel or a considerable part of the shank portion of the sole. Consequently it has been customary to buff the breast of the heel and the contiguous portion of the surface of the shank of the sole by hand.

According to one feature of the present invention, the forming of the flap as well as the buffing of the flap and the contiguous surface of the shank portion of the sole is accomplished at a single operation 0 that no hand bufling of these parts is necessary after the heel has been attached. In the illustrative machine the sole is placed upon a support or bed over which a carrier is caused to make one complete reciprocation and then come to rest; Mounted on the carrier is a flap-forming mechanism and a bufling tool the latter being spaced from and in front of the former. On the forward stroke, while the flap-forming mechanism is operating, the buffing. tool is held in inoperative position. On the return stroke, the buffing tool is brought down upon the sole at a locality in proximity to the forward end of the shank'portion of the sole and caused to buff the bottom of the sole, including the exposed surface of the newly-formed flap, from that locality to the extreme heel end of the flap. The further steps in the manufacture of a shoe, using the sole thus treated, are the same a have been carried out heretofore except that the buffing of the exposed surface of the flap after it has been cemented to the breast of the heel and of the contiguous surface of the shank portion of the sole is no longer necessary since these surfaces have already been buffed.

. This and other features ofthe invention, including certain details of construction and combinations of parts, will be described as embodied in. an illustrative machine and pointed out in the appended claims.

l Referring now to the accompanying draw- 1ngs, V

Figure l is a side elevation of a machine in {vhich the present invention is embodied, anc

Fig. 2 is a perspective of a sole after it has been operated upon by the machine.

The machine chosen for illustration is similar in many respects to the machine of Patent No. 1,224,918 and before proceeding to the new features, those common to the two machines will be described briefly. The machine comprises a frame 3 upon which a bed or work support 5 is indirectly mounted, such mounting comprising rollers 7 which are yieldingly maintained in the raised position shown by springs (not shown). These rollers extend through oblique slots 9 in flanges which are fast to the bed, the bed itself being free to move to the right or left except as limited by the slots and flanges and being capable of yielding downwardly with the rollers when force is applied to the surface of the support. Normally the support is as shown at the limit of its lefthand movement with the rollers at the righthand or upper ends of the slots 9 but will be raised slightly by being moved to the right before the knife enters the sole 100. Slidable on the frame is a carrier 11 which is caused to make one reciprocation over the support and then come to rest by tripping a one-revolution clutch and thereby causing a segment 13 to make a complete revolution.

This segment is pivoted to the rear end of.

a connecting rod 15 the forward end of which is indirectly connected by a pivot 17 to the carriage. This connection is not the same as in the patented machine, as will presently appear, but the general effect'of the clutch, connectingrod and connections in both cases is to cause the carrier 11 to make one complete reciprocation. Mounted rigidly in the carrier is a knife 19, and pivotally mounted in the carrier just in front of the knife is a gage or presser 21 upon the angular position of which depends the thickness of the flap produced by the knife. If the support 5 remained in the lowered posi tion shown and the carrier 11 were reciprocated, it is clear from the drawing that the knife would either pass entirely over the sole 100 or at most would just graze it. 7 In order to cause the knife to enter the sole and produce the desired flap,the support 5 is raised automatically after the carrier starts its forward movement. Thesupport carries at its rear end a pin on which is mounted a roller 28 which lies in the path of a segmental plate 25, said plate being fast to the rotatable segment 13. Thesupport has also at its rear end an eye 2'? through which passes loosely a screw 29 carrying near its rear end a stop nut 31 and having its forward end threaded into the frame of the machine. A coiled spring 33 encircles the screw and normally malntains the support in its left-hand lowered position, as shown, with the rollers 7 in the right-hand ends of the slots 9. Jifheinhowever, the segment 13 is rotated, the segmental plate rides upon the roller 28 thereby moving the support 5 to the right and causing it v. to rise by reason of the engagement of the slots 9 with the rollers 7. This raising of the support may be caused to occur either before or after the knife reaches the rear end of the sole according to the position to 1 which the plate 25. is adjusted with respect to the segment 13. In order to cut a sole in the manner shown in Fig. 2, which is the usual manner, the support is raisedbefore the knife reaches the locality of the sole.

. The gage 21 may be adjusted angular-1y to predetermine the thickness of thetlap 200 which will be produced. In the operation of the machine a sole 100 is placed upon the support 5 in the position shown and the clutch is tripped. The carrier with its knife 19 and gage 21 moves forward a short distance, but before the knife reaches the sole the segmental plate 25 rides upon the roller 23 thereby raising the support and holding it raised during the forward movement of the knife. Just as the knife-starts its rear-. ward or withdrawing movement, the segmental plate 25 runs off the roller 23, and the support moves downwardly and to the left into the position shown so as to prevent the gage from dragging over and stretrhing the flap 200 which has just been produced.

The machine as thus far described, except for the connection of the connecting rod 15 with the carrier 11 and the fact that the gage is not automatically adjusted, is substantially like the patented machine, and no fun ther detailed description of this part of the machine will be given. I

The purpose of forming the flap 200 is to provide a covering for the breast of a Louis heel which will be attached to the sole in the manufacture of a shoe. It is desirable before the shoe is finished to buii' the exposed face of this flap as well as the entire bottom of the sole. Hitherto the sole has been buffed by means of a machine having rolls which are two or three inches in diameter. With such rolls it is impossible to buff either the exposed face of the flap aft-er it has been cemented to the breast of a Louis heel or to buff the contiguous surface of the shank of the sole. It is not economical to use a small buffing roll owing to the frequency with which the abrasive covers must be renewed nor is it feasible with a roll, however small, to buff the breasts of Louis heels since these breasts often curve in two directions. For all these reasons it. has been customary to buif the breasts of such heels and the contiguous portions of the shanks of the soles by hand. According to the present invention the rear portion of the sole, including that portion of the shank which was formerly buffed by hand, is buffed in the same operation in which the flap is formed.

. In the illustrative machine the flap-forming operation is completed before the buffing operation is begun, but it should be understood that in its broader'aspects the invention is not limited to any particular sequence or timing of the two operations.

Thebuhing mechanism comprises a buffwhich power is taken by throwing in the one-revolution clutch referred to above so as to cause reciprocation of the carrier 11 when desired. The pulley 51 is mounted on a pin 55 carried by the stem of a double yoke 57 the arms of which are pivoted on the shaft 53. The pulley 4:7 is rotatably mounted in a block 59 which is slidable in a small yoke 61 formed at the upper end of the stem of the large yoke 57 and is urged upwardly at all times by a spring 63 the lower end of which is attached to the block 59 through a pin 65 and the upper end to a pin 67, the latter pin being fast to a bar 69 which is rigid with the small yoke 61. Pivoted to one arm of the yoke 61 at 71 is the stem of a yoke 73, the arms of whichare pivoted on the rod 89. The construction which has just been described provides means for maintaining the belt 43 taut during the reciprocation of the carrier 11 and for rotating the roll 35 con tinuously.

In the illustrative machine the roll is raised and held in raised inoperative positlon during the forward movement of the roll and carrier and'is brought down upon the sole during the. return movement. To this end two lost motion connections are prov1ded. The pivot 17 upon which the forward end of the connecting rod 15 is mounted is carried by a slide 75 which is slidably mounted in suitable ways formed in the carrier 11, said block having formed on its under side two lugs 77 between which extends a pin 79 which is held rigidly by its ends in the carrier. Consequently, after the machine has come to rest with the parts in the position shown and power is applied to the machine to cause the connection rod 15 to start its forward movement, the slide 75 moves forward without moving the carrier until the rear lug 77 contacts with the pin 7 9 after whichthe carrier moves. Again, when the forward half of the reciprocation ofthe carrier has been completed and the connecting rod 15 starts its backward move ment, the slide 75 is pulled backward until the forward lug 77 contacts with the pin 79 before the carrier begins its backward movement.- This mode offoperation may not always occur just described because a stop-screw 87 may be, used but for the present it will be assumed that the stop screw isnot present. There are thus two occurrences of lost motion between the slide 75 and the carrier during each complete recip rocation of the carried; and these two cccurrences are utilized to raise and lower the roll 35 at the proper times. To accomplish this raising and lowering, the slide 7 5 is forked at its forward end and carries a pin 81 upon which is swiveled a block 83, said block being located between two lugs 85, which are integral with the hub of the yoke'37. The extent of the lost motion permitted between the block 83 and the lugs 85 is considerably less than that permitted between the lugs 77 and the pin 79 so that the roll 35 will be raised before the carrier 11 starts its forward movement and will be brought down upon the sole before the carrier starts its rearward movement. An adjustable stop screw 87 may be provided if desired for limiting the downward movement of the roll toward the work support. This stop screw may contact with the carrier 11 at the same time that the forward lug 77 contacts with the pin 7 9 in which case the lug and the screw may both function in the backward movement of the carrier. If, however, the screw is so adjusted, as shown, that it contacts with the carrier before the forward lug 77 in its backward movement contacts with the pin 79, then, of course, the contact of the screw with the carrier determines the time when the carrier starts its backward movement.

Assuming, in order to promote brevity of description, that the stop screw 87 is in a position shown and that the machine is at rest, the operation is as follows: The operator places a sole 100 011 the bed or support 5 in the position shown in Fig. 1 and trips the one-revolution clutch. As the connecting rod 15 moves forward, the slide 75 is first moved by it, the carrier 11 remaining stationary owing to its weight and the friction of its sliding contact with the frame of the machine. Presently the block 83 strikes the forward lug 85 and raises the roll 35, then the rear lug 77 strikes the rod 79 and starts the forward movement of the carrier. Before the knife reaches'the end of the sole toward which it is traveling, the segmental plate 25 rides upon theroll 23 thereby pushing the support 5 forward and causing it to rise and bring the sole into the proper level with respect to the knife and gage. As the carrier completes its forward stroke the heel end of the sole is split to form a thin flap 200 as shown in Fig. 2. At about this time,

the segmental plate 25 runs off the roll 23' and permits the spring 33 to move the support 5 to the left and thereby lower the support and the sole slightly. As the-connecting rod moves back (to the left) the slide 75 is moved before the carrier is moved. The first effect is to cause the block 83 to contact with the rear lug 85 and bring the roll 35 down upon the sole at a point which is indicated by the extent of the buffed surface shown in Fig. 2. The extent of the downward movement of the roll is limited by the contact of the lower end of the stop screw 87 with the carrier if the screw is set in the position shown. Thereafter the carrier 11 moves rearwardly (to the left) and finally comes to rest in the position shown. During this rearward movement the roll runs onthe in suchmanner as to stock, a cutter, means a carrier supporting a knife and bufiing roll is movable over a sole supporting bed; but

A it should be understood that this particular type of machine has been shown merely by way of illustration and that the invention in its broader aspects is not limited to this or any other particular type of machine since applicant believes that he is the first to split and buff a piece of stock in one operation,

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is;

1. A machine of the class described, having in combination, means for forming a flap upon a piece of stock, and means for removing material from the flap.

2. A machine of'the class described, having in combination, means for forming a flap upon a piece of stock, and means for bufling the flap.

3. A machine of the class described, having in combination, a cutting tool, a buffing tool, and means for causing the tools to operaterupon a piece of stock to form thereon a flap one face of which is buffed.

, 4:. A machine of the'class described, having in combination, a cutting tool, a buffing tool, means for supporting a piece of stock,

and means for causing relative movement between the sup-porting means and the tools, to cause the tools to operate upon the stock.

5. A machine of the class described, having in combination, a cutting tool, a bufiing tool, means for supporting a piece of stock, and means for causing relative movement between the supporting means and the tools form upon the stock a flap one face of which is buffed.

6. A machine of the class described,having incombinatioma support for a pieceof stock, a cutter, means for producing relative movement between the support and the cutter first in a direction to cause the cutter to enter the stock and form a flap thereon and then ina direction to. cause the cutter to be withdrawn from the stock, andmeans for buflin the stock. o y 1 7. A machine of the class described, having in combination, a support for a piece of for producing relative movement between the support and the cutter first in a direction to cause the cutter to enter the stock and form a flap thereon and then in a direction to cause the cutter to be withdrawnfrom the stock, and means operating during the withdrawal for bufiing the flap; I

A machine of the class described, having in combination, means for forming a fiapon the heel portion of a sole extending from the extreme heel end to approximately the rear part of the shank portion, and means for buffing the entire flap and part of the shank portion of the sole. 9. A machine of the class described, having in combination, means for supporting a sole, a flap-cutting tool, a bufling tool. spaced from the flap-cutting tool, and: means for producing between the supported sole and the tools relative movement of sufficient extent to cause the bufiin'g tool to operate upon a greater extent of the solethan does the flap-cutting tool.

10. A machine of thenclass described, havmg incombination, a cutter, means for causing the cutter to form a flap upon a piece of stock, a. bufiing tool, and means for causing the tool to built the flap; 7

11. A machine of the class described, having in combination, a'cuttenmeans for causing the cutter to form a flap upon a piece of stock, abuffing tool, means for rotating the tool, and means for causing the tool to stock, a carrier, flap-forming; and buffing mechanism mounted on the carrier, and means for producing relative movement betweeen the support and the carrier'first to cause the flap-forming mechanism and then the buffing mechanism. to operate upon the stock. v

1 1. A machine of the class described, having in combination, a vcutter, means for caus-- ing the cutter to form aflap upon a piece of stock, a buffing tool, and means for holdin the tool out-of contactwith the stock during the formation of the flap and forthereafter, causing it to contact with and buff the flap. i

15. A machine of theclass described, having in combination, a support fora piece of stock, a carrier, means'for causing relative reciprocation between, thesupport and carrier, a cutter rigidly fastened to the carrier, 7

- an abrading tool mounted on the carrier and movable with respect thereto into and out of operative position, and means for so moving the tool during each reciprocation. V

16. A machine of theclass described, having in combination, a support for a piece of stock, a carrier, means for reciprocating the carrier over the support, a cutter rigidly fastened to the carrier, an abrading tool mounted on the carrier and movable into and out of operative relation with respect tothe support, and means for holding the tool'out of operative relation during part ofthe reciprocation and for moving it into operative relation before the reciprocation is completed.

17. A machine of the class described, having in combination, a support for a piece of stock, a carrier mounted for reciprocation over the support, a cutter fast to the carrier, an arm pivoted to the carrier, a buffing roll mounted on the arm, an actuator for the carrier having a lost motion connection there- With and lugs on the arm located in the path of the actuator.

In testimony whereof I have signed my name to this specification.

FREDERICK M. FURBER. 

